To determine whether or not your blood glucose level is within normal ranges; to screen for, diagnose, and monitor diabetes, and to monitor for the presence of hypoglycaemia(low blood glucose) and hyperglycaemia (high blood glucose).
In general, it is recommended that you fast (nothing to eat or drink except water) for at least 8 hours (generally 8-10 hours fast) before having a blood glucose test performed. For people with diabetes, glucose levels are often checked both while fasting and after meals to provide the best control of diabetes.
The results of a fasting test with respect to glucose levels in the body are as follows:
The results of a random test are as follows:
- Normal: 3.9 to 5.4 mmols/l (70 to 99 mg/dl)
- Prediabetes or Impaired Glucose Tolerance: 5.5 to 6.9 mmol/l (100 to 125 mg/dl)
- Diagnosis of diabetes: 7.0 mmol/l (126 mg/dl) or above
- Suspected diabetes, further tests will be needed: Under 11.1 mmol/l
- Diagnosis of diabetes: 11.1 mmol/l